1MQS

Crystal structure of Sly1p in complex with an N-terminal peptide of Sed5p


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.257 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural basis for the Golgi membrane recruitment of Sly1p by Sed5p

Bracher, A.Weissenhorn, W.

(2002) EMBO J 21: 6114-6124

  • DOI: 10.1093/emboj/cdf608
  • Primary Citation of Related Structures:  
    1MQS

  • PubMed Abstract: 
  • Cytosolic Sec1/munc18-like proteins (SM proteins) are recruited to membrane fusion sites by interaction with syntaxin-type SNARE proteins, constituting indispensable positive regulators of intracellular membrane fusion. Here we present the crystal structure of the yeast SM protein Sly1p in complex with a short N-terminal peptide derived from the Golgi-resident syntaxin Sed5p ...

    Cytosolic Sec1/munc18-like proteins (SM proteins) are recruited to membrane fusion sites by interaction with syntaxin-type SNARE proteins, constituting indispensable positive regulators of intracellular membrane fusion. Here we present the crystal structure of the yeast SM protein Sly1p in complex with a short N-terminal peptide derived from the Golgi-resident syntaxin Sed5p. Sly1p folds, similarly to neuronal Sec1, into a three-domain arch-shaped assembly, and Sed5p interacts in a helical conformation predominantly with domain I of Sly1p on the opposite site of the nSec1/syntaxin-1-binding site. Sequence conservation of the major interactions suggests that homologues of Sly1p as well as the paralogous Vps45p group bind their respective syntaxins in the same way. Furthermore, we present indirect evidence that nSec1 might be able to contact syntaxin 1 in a similar fashion. The observed Sly1p-Sed5p interaction mode therefore indicates how SM proteins can stay associated with the assembling fusion machinery in order to participate in late fusion steps.


    Related Citations: 
    • Three-dimensional structure of the neuronal-Sec1-syntaxin 1a complex
      Misura, K.M.S., Scheller, R.H., Weis, W.I.
      (2000) Nature 404: 355
    • The X-ray crystal structure of neuronal Sec1 from squid sheds new light on the role of this protein in exocytosis
      Bracher, A., Perrakis, A., Dresbach, T., Betz, H., Weissenhorn, W.
      (2000) Structure 8: 685
    • Crystal structures of neuronal squid Sec1 implicate inter-domain hinge movement in the release of t-SNAREs
      Bracher, A., Weissenhorn, W.
      (2001) J Mol Biol 306: 7

    Organizational Affiliation

    European Molecular Biology Laboratory, 6 rue Jules Horowitz, 38042 Grenoble, France. bracher@embl-grenoble.fr



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Sly1 ProteinA671Saccharomyces cerevisiaeMutation(s): 10 
Find proteins for P22213 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P22213 
Go to UniProtKB:  P22213
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Integral Membrane Protein SED5B50Saccharomyces cerevisiaeMutation(s): 0 
Find proteins for Q01590 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore Q01590 
Go to UniProtKB:  Q01590
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.00 Å
  • R-Value Free: 0.290 
  • R-Value Work: 0.257 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 161.056α = 90
b = 161.056β = 90
c = 88.209γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SnBphasing
SOLVEphasing
RESOLVEmodel building
CNSrefinement
RESOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-11-20
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-11
    Changes: Refinement description